dutton



F. H. DUTTON.

LIGHT RAILWAY SYSTEM AND LocoMoTLvE LHERL'FOH.v

APPLICATION FILED FEB. 1a. |918.

Patented June l0, 1919.

4 SHEETS-SHEET I.

FIGA. 1.

LIGHT RAILWAY SYSTEM AND LocoMoTlvE THEREFOR.

APPLICATION FILED FEB. I8

Patented June 10, 1919.

4 SHEETS-SHEET 2.

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I Fia/1K #enr/afton FIG. 6. I" 5,/

F. H. BUTTON.

- LIGHT RAILWAY SYSTEM AND LocoMonvE THEREFOR.

APPLICATIN FILED FEB-18. 1918. 1,306,051, Patented June 10, 1919.

A FHEETSAHEET s.

Fun/z #em/ punk $7/ plm/(nbr lter/251% F. H. DUTTON.

LIGHT RAILWAY SYSTEM AND LIOCOMOTIvVE THEREFOR. .'APPLlcATroN FILED FEB.18. 1918.

'p nesburg, Transvaal Province of the Union of f South Africa, (whose address is Room No.

FRANK HENRY BUTTON, vOili J OHANN'ESIBUIlStG, TRANSVAAL, SOUTH AFRIC.

LIGHT-RAILWAY SYSTEM AND LocoMoTIvE THEREFQR.

I Specification of Iettersilatent.

Patented June 10, 1919.

Application led February 18, 191,8). Serial No. 217,970.

To all whom it may concern:

Be'it known that I, FRANK TON, a British subject, and resident of Johan- 182, South African Railway Buildings, Johannesburg, aforesaid,) have invented certain new and useful Improvements ,in nection with'Light-Railway Systems and Locomotives Thereof, of which the following is `track 1, 1, Figs. 2, 3, audit is employed, on

a specilication. v

The present invention relates to lightrail- Ways ofthe type 1n which the load carried on a rail track for ease of propulsion,

while the driving wheels of the locomotive run on a parallel road trackin order fto give high tractive effort and to relieve the rail i that-it can be track of the driving load, so lightly and cheaply built.'4

Mono-rail systems of this type whlc'h have been Aproposed involve certain disadvantages limiting their practical application. The vehicles 1n such a system require to--be provided with balancing wheels, usually o n each when in moside, which cause the vehicle, tion o r on curves, or when unevenly loaded, to rock from side to side. The vehicles run partly on the mono-rail and partly onv the ground alongside the track thus losing the great advantage of low tractive resistance gained by running on rails. If mono-rail vehicles are attached to a locomotive for balancing purposes all necessary freedom of actionl on curves is lost. Locomotives for monorail systems that have beenproposed are incapable of running Ibackwards and havel not the desirable flexibility to allow for the inaccuracies of alinement between the rail and the wheel wav. v It is the obiect of the present invention to provide a simple and practicable system of the kind in question, and to provide certain novel constructions of locomotives therefor, as hereinafter described.

In the accompanying drawings Figure 1 is a side elevation of one type of locomotive.

Figs. 2 and 3 are respectively a partial p Figs. 5 and respectively an elevation and plan of another type of locomotive.

HENRY DUr- Vthe pane A A Fig.

Con-

1 nmg on Awheels operate in is a plan of another locomotive. Fig. 8i' 1s a side elevation of the chassis thereof'.v

Fig. 9 is a detail sectional view taken on Fig. 10 is a side elevation of-a further type v of locomotive. l

Fig. 11 is a plan of portion ofthe chassis thereof.

According to this invention a two rail run the rubber tired driving wheels of the l-ocomotive. f

The rolling stock 3 is of ordinary railway type having atv least four `wheels 4 all runtherail track. It is thus self supporting and self balancing at all times; is

not affected by inequalities between the rail track and the wheel way; is handled in the same way as rollin stock of ordinary light railways, and afl'or s the minimum of tractive resistance.

The locomotive may bev constructed to runV only on the compound track or it maybe adaptable for runningboth on said track and on an ordinary road. A locomotive of this latter kind can be detached and run around the train without requiring special loops for thatv purpose.

An example of this type is 1 to 4. 5, 5, are the rear driving wheels, and 6, 'the front steering wheels, all fitted with rubber tires 7 When the tractor is used as a road vehicle all four wheels. are on the road, the steering being effected by the usual steering wheels 8 operating ont e front Wheels 6. The rear the ordinary way as driving wheels rigidly alined with the'back axle 9 in which is the differential gear 10. The front wheels are controlled from the steering wheel 8 through the usual vertically The stub axles 12, 12, rotate horizontallyv on gun-metal nuts 70, 70 which are moved,

shown in Figs.l

. 11 by rotatable screws 13, 13. The screws up and down between the axle brackets 11,

are shown as driven by power from the engine 14 through a reversible frictionclutch 15 and chain gearing 16.

17 is a four wheel bogie adapted for running on the rail track l and provided with the ball element`18 of a ball and socket joint. On the axle 19 or other convenient part of the front of the 'tractor is provided lthe socket element 20 of the ball joint. To

convert'the tractor to a rail locomotive the tractor Vand the bogie are brought into the proper relative position, whereupon the steering wheels`f6, 6, are raised clear ofthe ground by means of the mechanism A15, 16,

w 13, 70 so bringing the ball joint elements 18, 20 together and causing the support to be transferred from the wheels 6, 6 to the bogie 17. V

During the forward traveling, the locomotive is guided simply by the bogie 17 traveling on the rails; the rear wheels, being trailing, follow the rail tracks, the.ball joint 18, 20 and the diiferential 10 in the back axle 9- permitting the paths of the rear wheels to conform closely to therail track.

For reversed movement on the track, as when shunting, the rear wheels 5, 5 are made steerable. For this purpose there is shown' obviating any undue vertical or horizontal angularity either when curves are being traversed or owing to inequalities that exist between the levels of the rail track and Wheelways. This 4arrangement also prevents any disturbing action on the driving wheels of the locomotive by the trucks when descend.- in steep grades.

' he tractor is fitted with the usual change Speed gears and reverse gear operated by lever 29.

Figs. 5 and 6 show a locomotive designed to remain on the track and arranged for forward and reverse movement at all speeds.

It has asingle pair of driving wheels 5, 5'

on a differential axle 9 'arranged about centrally of the length of the locomotive. axle carries the necessary amount of the weight of the locomotive through the medium of sprin s 31.

Associated with the axle 9 is a four wheel Saidl bogie 32 running on the rail track 1. Said bogie 1s anchored to the engine frame by means of two ball joints 33, 33 and tie rods 34.` The axle 9 is connected to the bogie by horns 35 which permit said parts relative vertical play either bodily or canting, but keep them otherwise rigid, so that the bogie 32 keeps the wheels 5 running parallel with the rail track 1. The draw bars 36 are 'attached to the frame of the bogie.

Fore and aft of the bogie 32 are the twowheelbogies 37, 37. Each of these is pivoted to the bogie 32 at 38, land is controlled by horizontal springs 39 which tend to keep the three bogies in line. The three bogies thus afford the stability against lateral oscillation due to the well known hunting action of bogies, whilebeing free to pass easily around curves of short radius."

Each fore and aft bogie has at the top a roller path 40 on which bear rollers 4l carried on transverse leaf springs 42 thus supporting the locomotive against pitching and rolling. It will be apparent that the arrangement substantially obviates any deleterious effects due to inequalities of the road track and the rail track and that in particular inequalitiesI of the road track do not tend to throw the rail wheels ofll their track. j

The motive arrangements comprise the engine 14, speed gear 29 and reversing gear 30.

A locomotive designed Afor greater tractive effort without however increasing the axle load Vo n the rails is shown in Figs. 7, 8 Iand 9. It has two pairs of driving wheels 5, 5, 5, 5, carried on differential axles 9, 9.

Said axles are connected to the locomotive frame by leaf springs 31. y

44, 45 indicate two similar four-wheel bogies running onthe rail track 1. 46y are V frames depending from the main frame 47 of the tractor and carrying a longitudinal bar 48. Pivoted to `each end of said bar 48 is a. link49 the other e-nd of which is connected by a ball joint 50 to one of the bogies 44, 45. Secured to the V frames 46 is spring- 51 which transmits the desired proportion of the weight of thc tractor to the bogies 44, 45.

The wheels 5 are carried on steering driving axles 52 which are steered by the .rail bogies 44 and 45, arrangements being made whereby the steering is effected by the leadingI bogie whether the movement is forward or reverse. All the steering axles 52 are connected by link work 53 to turn together. On each bogie 44, 45 is a disk 54, 55 formed with a slot 56 which engages a pin 57 on one of ,the connecting links 58.A Said disks are rotatable and are connected bv 'chain gearing 59 to rotate together. The slots 56 are at 90 with each other, and that on the leading bogie is tractor.

The former slot therefore engages its pm 57 operatively to -actuate the steering linkwork 53 while the latter slot is inoperative.v

It may be arranged that the necessary rotation of the disks 54, 55 to render'them alternately operative and non-operative is effected by the reversing control 60 of the locomotive.

The effect of the arrangement is that the leading bogie, upon turning when entering a curve, operates its rod 58 to turn the driving wheels into a following position.-

This locomotive is, like the foregoing, provided with an engine 1.4, speed gear 29, and reversing gear 30 and with driving gear 61l to each axle 9.

Figs. 10 and 11 show a locomotive having two four wheel bogies, and driving wheels that are always trailing and therefore do not require steering.

The bogies 62 are connected by a link 63 and each carries a coupling 64 for a draw bar. Each also carries the ball element 65 of a ball joint.

Two pairs of driving wheels 5, 5, are provided, each pair near to one end of the Each pair is carried on a differential axle 9 mounted 'on a lever 66. Each of said levers 66 has at one end .of the socket element 67l of a ball joint. At its other' end it is connected to mechanical raising and lowering gear 68. Said-gears 68 are both connected by means 69 to the engine 14 t0 be o erated simultaneously; the arrangement being that one of the axles 9 is raised while the other is lowered. The socket end of the lever 66 of the lowered axle engages the ball 65 on the adjacent bogie.

In practice, the leading pair of driving wheels 5, 5 are lifted clear of the ground. The weight of the tractor is therefore taken on the forward one of the bogies 62, and

on the rear driving wheels which rest on the ground the steering being. effected by the forward bogie following the track. The rear bogie for the time beingV has no function but to transmit the tractive effort from the forward bogie and theV link 63 to the draw bar attached to its connection 64. When it is intended to reverse the locomotive the driving wheels which were formerly raised are. lowered and become operative; the bogie that was trailing becomes steering and vice versa.

1. A light railway system, comprising a two rail track, and two outside road wheel- Ways, a locomotive having one or more fourwheel bogies pivoted to the frame and running on the rail track and one or more differentially driven pairs of driving wheels shod with resilient tires running on the road wheel-ways, and ordinary rolling stock runing'whooly on the rail track and attached for traction'to the rail bogie of the locomotive.

2. A locomotive for a system of the kind described, comprising a four-wheel bogie running on the rail track and pivotally attached to the locomotive frame, and one or more pairs of driving wheels carried on a differential axle, said driving wheelsfhaving 'resilient tires and being arranged to run on the ground at each side of the rail track.

3. A locomotive for a system of the kind described, comprising a four wheel bogie arranged to run on a rail track, a differential driving axle, driving wheels having resilient tires carried on said axle at a dis-V tance apart to straddle the track, said bogie being arranged for guiding the locomotive along the rail track and connections permitting horizontal movement of the bogie relatively to'the driving wheels.

4. A'locomotive for a system of the kind described comprising a four Iwheel bogie arranged to run on a rail track, a differential axle, driving wheels having resilientl tires carried on saidl axle at a distance apart to straddle the track, saidbogie being arranged for guiding the locomotive along the rail track and connections permitting both horizontal and vertical movement of the bogieA relatively to the driving-wheels.

- 5. A locomotive for a system of the kind described comprising a four wheel bogie arranged to run on a rail track, a differential driving axle, drivingwheels having resilient y tires carried on said axle at a distance apart to straddle the track, said bogie being farrangedto control the direction of the driving wheels to guide the locomotive along the rail track, and connections permitting horizontal movement of the bogie relatively to the driving wheels.

6. A locomotive for a system of the kind described, comprising a four wheel bogie, at each end pivotally connected to the locomotive frame, differential vaxle means, and rubber tired driving wheels carried on said diiferential axle means and spaced apart to straddle the track.

7. A locomotive for a system of the kind described, comprising twopairs of. road wheels having resilient tires and a four Wheel rail track bogie, said bogie and an adjacent pair of road wheels being arranged to be Valternatively brought into running position.

8. A `convertible locomotive for a system of the kind described, comprising front steering wheels and rear driving wheels for road locomotion. said rear driving wheels having resilient tires, a diiferential axle for the driving wheels, a four wheel bogie adapted to run on a rail track, and pivotal means separably connecting the bogie to the `front of the locomotive, 'said bogie whenv in place holding the front steering wheels clear of the ground.

9.V A-convertib1e locomotive for. a system of the kind described, comprising frontsteering Wheels and rear driving wheels for road locomotion, said driving wheels having resilient tires',.a differential axle for the 16 for locking* the rear Wheels for forward 15 running.

- In testimony whereof I aix my signature. FRAN K.HENRY DUTTTON. 

